| Goodwill (Tables) | 6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Jul. 31, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Intangible Assets Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill for the periods presented were as follows (in thousands): 
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| X | ||||||||||
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- References No definition available. 
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| X | ||||||||||
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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